Minerals are the essential nutrients having significant role in the animal nutrition because of both their excess and deficiency produce detrimental effect en the productive and reproductive performance of the animals. In the present study the levels of macro and micro mineral elements were studied in crossbred and non-descript cattle of Punjab and Sind provinces of the country. For this purpose M6 blood samples from both the local breeds been' randomly collected from districts of Lahore, Gujranwala, Gujrat, Sargodha, Jhang, Faisalabad, Okara and Sahiwal of Punjab province and Karachi , Hyderabad and Tharparkar of Sind province. These areas were included in the study because of higher population of dairy cattle. The blood samples were collected from four different classes of cattle i.e.. calves, heifers, dry pregnant and lactating non pregnant. The serum was separated from the blood samples. Ser4Jm samples were analysed f or calcium, phosphorus, sodium, potassium, magnesium, zinc, copper, manganese and iron. Sodium and potassium were analysed on flame photometer while calcium magnesium, 7)n4 copper, manganese and iron were analysed on atomic absorption spectrophotometer. Double beam spectrophotometer was used for the estimation of phosphorus. The data thus obtained was subjected to statistical analysis using complete randomize design arid the differences in the means were tested using DMR test.

The mean values of serum minerals in crossbred cattle of Punjab province were Calcium 7.04 mg/100ml, phosphorus 2.94 mg/100 ml, sodium 125.17 meq/L, potassium 4.67 meq/t, magnesium 2.49 mg/100 ml, zinc 0.81 ppm, copper 0.69 ppm, manganese 0.45 ppm and iron 1.26 ppm. Highly significant difference (P<0.0l) in the values of serum minerals of crossbred cattle were found among districts while difference among various classes of crossbred cattle were non significant (P>0.05). The mean values far non descript cattle of Punjab and Sind provinces were, calcium 6.83 mg/100 ml phosphoras 2.83 mg/100 ml. sodium 130.10 meq/L, potassium 4.96 meq/L.. magnesium 2.55 mg/ 100 ml, zinc 0.86 ppm, copper- 0.72 ppm, manganese 0.47 ppm and iron 1.32 ppm.. Highly significant difference (P<0.01) was found among various classes in different districts of Punjab and Sind province. The variation in the mineral status of the animals under study might be due to many factors Like breed of animals, plane of feeding practices, composition of soil, source and supply of water and climatic conditions of the region etc.
The serum mineral values observed f or crossbred and non--descript cattle of Punjab and Sind provinces of the country were relatively lower than the exotic breeds reported in the literature. While comparing the serum mineral values of crossbred with non-descript cattle, lower values for most of the minerals were found in crossbred cattle except calcium and phosphorus.

Severe deficiency of serum phosphorus, zinc and copper was observed in both breeds of cattle of Punjab and Sind provinces of the country, while a mild deficiency of serum sodium and manganese was recorded. Crossbred animals were found more prone to mineral deficiencies as compared with the non-descript animals.