ÿþ<html> <head> <meta http-equiv="Content-Type" content="MR"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title> :: Crop Weather :: </title> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <meta name="keywords" content="Publication, Shetkari magzin, Litereture , Shetishastra,Agriculture Portal, Maharashtra Government, employment, law and acts "> <META NAME="description" CONTENT="This is the Portal of Agriculture Department of Maharshtra State (India), developed with an objective to enable a single window access to information and services being provided by Agriculture Department."> <Script language="JavaScript"> var Txt = "Welcome to mahaagri.gov.in (Department of Agriculture ,Government of Maharashtra)"; var space = " "; var A =0; function MessageInStatus() { window.status = Txt.substring(A, Txt.length) + space + Txt.substring(0, A); A ++; if (A > Txt.length) A = 0; window.setTimeout("MessageInStatus()", 200); } MessageInStatus(); </Script> <style type="text/css"> <!-- body { margin-left: 1px; 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font-family:"Times New Roman"; font-weight:bold} ----> </style> </head> <body bgcolor="#EFEFEF" > <table id="Table_01" width="1" height="1" border="0" cellpadding="0" cellspacing="0"> <tr> <td rowspan="2" height="1" width="168" bgcolor="#536A45"> <p style="margin-top: 0; margin-bottom: 0"> <img src="../images/InnerIndex_01.gif" width="168" height="169" alt=""></td> <td colspan="3" height="90" width="838" bgcolor="#536A45"> <p style="margin-top: 0; margin-bottom: 0"> <img src="../images/InnerIndex_02.gif" width="833" height="97" alt=""></td> </tr> <tr> <td height="1" width="63"> <p style="margin-top: 0; margin-bottom: 0"> <img src="../images/InnerIndex_03.gif" width="63" height="72" alt=""></td> <td height="1" width="705"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber3" height="28"> <tr> <td width="100%" bgcolor="#9AD7ED" height="28" dir="ltr"> <p style="margin-left: 55; margin-top: 0; margin-bottom: 0"><b> <font face="Verdana" color="#008000" style="font-size: 11pt"> Salient Features of Rainfall</font></b></td> </tr> </table> </td> <td height="1" width="84" background="../images/InnerIndex_05.gif"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="80%" id="AutoNumber4" height="29"> <tr> <td width="26%" bgcolor="#9AD7ED" height="29" dir="ltr"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="9%" height="29" dir="ltr"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="18%" bgcolor="#9AD7ED" height="29" dir="ltr"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="3%" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="14%" bgcolor="#9AD7ED" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="5%" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="11%" bgcolor="#9AD7ED" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="11%" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="5%" bgcolor="#9AD7ED" height="29"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> </tr> </table> </td> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="99%" id="AutoNumber1" height="393"> <tr> <td width="100%" height="393"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="99%" id="AutoNumber2" height="1"> <tr> <td width="17%" height="1" bgcolor="#536A45" valign="top"> &nbsp;</td> <td width="83%" height="1" valign="top" align="center"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber5"> <tr> <td width="100%"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="99%" id="AutoNumber6" height="24"> <tr> <td width="8%" height="291"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</td> <td width="92%" height="291" dir="ltr"> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana">ONSET:-</span></b><span style="font-size: 11.0pt; font-family: Verdana">The period characterizing an abrupt rise in the normal rainfall curve is taken to define the onset of monsoon. In Maharashtra the normal date is 7th June. The Onset is very critical for sowing of Kharif Crops. Delay in Onset hampers the sowing progress. </span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana">&nbsp;</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana"> <a href="http://mahaagri.gov.in/agri/stat/asp/nsowinput.asp">(Click to recommended sowing dates)</a></span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana"> <a href="ContigencyPlaning.html"> (Click to contingency planning)</a> </span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana"> <a href="http://mahaagri.gov.in/agri/stat/map/onset.htm"> (Click here to see Map of On-set dates)</a></span> </span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana">&nbsp;</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana"> WITHDRAWAL: -</span></b><span style="font-size: 11.0pt; font-family: Verdana"> Is defined as the end of rainy season on the last date on which a threshold amount was exceeded. Another means of finding out the end of rains was to use the 1<sup>st</sup> occurrence of a long dry spell after a specific date. Withdrawal of monsoon mainly affects the status of residual moisture to be used in Rabi season. </span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0">&nbsp;</p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana">DRY SPELL: -</span></b><span style="font-size: 11.0pt; font-family: Verdana"> Dry spell like the drought means from the agronomic point of view, a dry spell is not a drought of climatic magnitude but a period of a few days or weeks. A dry spell is interval between two wet spells of seven day magnitude with at least 25 mm of rain. Five of these seven days must have rainfall of more than 1 mm or more. Dry spells at critical crop growth stages affect the growth and the ultimate production of crop.</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <span style="font-size: 11.0pt; font-family: Verdana">&nbsp;</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana"> INTENSITY:-</span></b><span style="font-size: 11.0pt; font-family: Verdana">Amount of rainfall occurred per unit period of time. Heavy intensity of rainfall causes soil erosion and crop losses. It is very important for flood management and design of soil and water conservation structures.<br> &nbsp;</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana">WET SPELL :- </span></b> <span style="font-size: 11.0pt; font-family: Verdana">Wet spell is defined as a rainy day ýÿxýÿ mm of rainfall or seven days spell where the total amount of rainfall equals to x mm or more and the condition that 3 out of these seven days must be rainy with rainfall of more than 2.5 mm of each day.</span></p> <p class="MsoNormal" style="text-align: justify; margin-top: 0; margin-bottom: 0"> <b><span style="font-size: 11.0pt; font-family: Verdana"> CRITICAL DRY SPELL: - </span></b> <span style="font-size: 11.0pt; font-family: Verdana">Is defined as the duration between the end of the wet spell and the start of another wet spell, during which a fifty percent depletion of available soil moisture occurs in the top 50 cm. 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