Using different of water qualities to quantify the effect salinity threshold by equation of the straight Line, Maas and Hoffman equation of sorghum bicolor crop

الملخص EN

The experiment was carried out during the spring season 2017-2018 in one the fields the Department of Horticulture and Garden Engineering Collge of Agriculture, Al-Qasim Green Univeristy, Soil used had the texture of Silty Clay loam and by using the design of the RCBD after placing the soil in wooden containers of dimensions (40 * 60 * 60 cm.

to determine the salinity threshold of the sorghum bicolor Moench (L.) Crop.

Threshold to salinity was calculated mathematically to soil and irrigation water to obtain a relative yield of 100%, based of the straight line equation were values were 6.8 and 2.1 dSm- 1 on the relay, and Maas and Hoffman (1977) equation values were 3.7 and 2.5 dSm-1 on the relay.

It was found that Sorghum Bicolor Crop.

yield achieved 100% yield when soil salinity and irrigation water was 4.5, 6.8 dSm-1 on the relay according to the Food and Agriculture Organization of the United Nations Bulletin No.

29 (Ayers and Westcot, 1985).