THE INTERACTION EFFECT OF BIOCHAR AND BINTONITE ON SOME PHYSICAL PROPERTIES OF DESERT SOIL AND BROAD BEAN PRODUCTIVITY

A field experiment was carried out to evaluate effect of biochar and bentointe and their interaction on some physical properties of desert soil and broad bean productivity. The study included four levels of biochar (Seek) (0, 10, 20 and 30 Mg ha-1 (S0, S1, S2 and S3) and four levels of bentonite (0, 10,20 and 30 Mg ha-1) (B0, B1, B2 and B3). The experiment was carried out according to randomized complete block design (RCBD) with three replicates. The results indicated that the application of biochar and bentonite significantly affected on physical properties. The fourth level of biochar and bentonite gave the highest values of moisture content at field capacity, wilting point and available water reached 16.38, 7.00 and 9.39%, respectively for biochar and reached 16.29, 6.75 and 9.54%, respectively for bentonite. While the fourth level of both two amendments gave lowest value of bulk density which reached 1.34 and 1.55 Mg m-3 for biochar and bentonite respectively. The results showed also that the fourth level of biochar and bentonite gave the highest values of green pods and seeds yield which reached 17.540 and 3.039 Mg ha-1, respectively for biochar and 28.990 and 3.353 Mg ha-1, respectively for bentonite, The interaction between two amendments, the treatment (S3B3) was the most efficient in giving the lowest value for bulb density and highest values for the other physical soil properties and plant productivity.