EFFECT OF  PLOWING AND PLANTING METHODS ON THE GROWTH AND PRODUCTION OF CORN CROP ( ZEA MAYS L.)

	EFFECT OF PLOWING AND PLANTING METHODS ON THE GROWTH AND PRODUCTION OF CORN CROP ( ZEA MAYS L.)
Jornal of Al-Muthanna for Agricultural Sciences
Article 1, Volume 4, Issue 1, 2016, Pages 1-15
Abstract
Abstract field experiments were conducted in Almdiana district in autumn season 2014 – 2015 in ALmalha Irrigation project , to study the effect of the plowing and planting methods on the growth and production of corn crop ( Zea mays L.) . The plowing methods represent the main plots while the planting methods represent the sub-plots .The plowing method includes four plows namely, subsoiler , combined subsoiler , moldboard plow , harrowing chisel and zero tillage. The methods of planting include rows and furrows , The results were analyzed using complete randomize design within split – plots. The results also showed that the plowing and planting methods significantly Effected the plant growth and production parameters , while the interaction was not significant in its effect on the studied parameters except the seed production of signal plant . The combined subsoiler surpassed the other plowing methods in all plant parameters studied which they are plant height , leaf area, number of ears per plant , seeds production per signal plant and seed production , biological production , number of seeds per row and weight of 500 seeds . It gave the highest values which they are 129.6 cm , 10531.9 cm2, 1.667 ears per plant-1 , 166 g.plant-1 , 6684.16 kg.ha-1 , 14.187 kg.ha-1, and 113.70 g respectively. The combined subsoiler recorded the highest seeds per ear while zero tillage recorded the lowest values which they are 89.8 cm , 6489.0 cm2 , 1.000 ear per plant-1, 92 g.plant-1 , 3975.21kg.ha-1, 12.468 kg.ha-1 , and 85.70 g respectively For planting methods , the furrows planting method surpassed the rows planting method in giving highest values of studied parameters . The values are 121.4 cm , 8803.5 cm2, 1.333 ears per plant-1, 138 g.plant-1 , 5180.18 kg.ha-1, 13.63 kg.ha-1, 100.66g respectively , Expect number of seeds per row surpassed furrows planting it gave the highest value (27.40) while the rows planting give lowest value (27.00) of seeds number per rows , whereas the row planting method gave the lowest values . The other plowing methods significantly Effected the plant parameters . The results showed that the moldboard plow and the subsoiler gave the highest value after the combined subsoiler while the results were very dose for harrowing chisel and zero tillage with small domination for the harrowing chisel in some parameters .

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